Here are some common problems to re-check:
1. Make sure all files (except .jpg and .gif) have been uploaded in ASCII. Some FTP programs have an Auto mode, but if certain extensions like .cgi or .pl have not been explicitly set to upload in ASCII, the FTP program will upload them in Binary.
2. Check your permissions. All files in the UBBCGI directory need to be chmod to 755 (except for the four variables files. Those need to be 777). The Members directory and Admin5.cgi also need to be chmod to 777. The NONCGI directory needs to be chmod 777.
3. Unix is case-sensitive. That means that your files need to be uploaded exactly the way they are in the UBB distribution (some FTP programs default to uploading everything in lowercase. This is not good.). The Members directory must have a capitol M on the front, and Admin5.cgi must have a capitol A.
4. Make sure you have the correct path to perl defined in your .cgi files. Most systems are #!/usr/bin/perl or #!/usr/local/bin/perl. If you have telnet access, you can type which perl or whereis perl and find out which you have. It's also a good idea to try perl -v to make sure that perl 5 is running.
I noticed you're running your script from a cgi-bin directory, make sure your web host allows 3rd party scripts to run from that directory.
Finally, check to see if there are any .htaccess files on your site that might be causing redirects whenever accessing files in your cgi-bin.
Dougdarksaber.hispeed.comOne Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the Land of Mordor where the Shadows lie.
--J.R.R. Tolkien, The Lord of the Rings